[SCSI] a4000t, zorro7xx, mvme16x, bvme6000,sim710: xxx_device_remove seems buggy
[linux-2.6.git] / drivers / scsi / a4000t.c
1 /*
2  * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
3  *              Amiga Technologies A4000T SCSI controller.
4  *
5  * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
6  * plus modifications of the 53c7xx.c driver to support the Amiga.
7  *
8  * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
9  */
10
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <asm/amigahw.h>
16 #include <asm/amigaints.h>
17 #include <scsi/scsi_host.h>
18 #include <scsi/scsi_transport_spi.h>
19
20 #include "53c700.h"
21
22 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>");
23 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
24 MODULE_LICENSE("GPL");
25
26
27 static struct scsi_host_template a4000t_scsi_driver_template = {
28         .name           = "A4000T builtin SCSI",
29         .proc_name      = "A4000t",
30         .this_id        = 7,
31         .module         = THIS_MODULE,
32 };
33
34 static struct platform_device *a4000t_scsi_device;
35
36 #define A4000T_SCSI_ADDR 0xdd0040
37
38 static int __devinit a4000t_probe(struct device *dev)
39 {
40         struct Scsi_Host * host = NULL;
41         struct NCR_700_Host_Parameters *hostdata;
42
43         if (!(MACH_IS_AMIGA && AMIGAHW_PRESENT(A4000_SCSI)))
44                 goto out;
45
46         if (!request_mem_region(A4000T_SCSI_ADDR, 0x1000,
47                                 "A4000T builtin SCSI"))
48                 goto out;
49
50         hostdata = kmalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
51         if (hostdata == NULL) {
52                 printk(KERN_ERR "a4000t-scsi: Failed to allocate host data\n");
53                 goto out_release;
54         }
55         memset(hostdata, 0, sizeof(struct NCR_700_Host_Parameters));
56
57         /* Fill in the required pieces of hostdata */
58         hostdata->base = (void __iomem *)ZTWO_VADDR(A4000T_SCSI_ADDR);
59         hostdata->clock = 50;
60         hostdata->chip710 = 1;
61         hostdata->dmode_extra = DMODE_FC2;
62         hostdata->dcntl_extra = EA_710;
63
64         /* and register the chip */
65         host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata, dev);
66         if (!host) {
67                 printk(KERN_ERR "a4000t-scsi: No host detected; "
68                                 "board configuration problem?\n");
69                 goto out_free;
70         }
71
72         host->this_id = 7;
73         host->base = A4000T_SCSI_ADDR;
74         host->irq = IRQ_AMIGA_PORTS;
75
76         if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
77                         host)) {
78                 printk(KERN_ERR "a4000t-scsi: request_irq failed\n");
79                 goto out_put_host;
80         }
81
82         dev_set_drvdata(dev, host);
83         scsi_scan_host(host);
84
85         return 0;
86
87  out_put_host:
88         scsi_host_put(host);
89  out_free:
90         kfree(hostdata);
91  out_release:
92         release_mem_region(A4000T_SCSI_ADDR, 0x1000);
93  out:
94         return -ENODEV;
95 }
96
97 static __devexit int a4000t_device_remove(struct device *dev)
98 {
99         struct Scsi_Host *host = dev_get_drvdata(dev);
100         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
101
102         scsi_remove_host(host);
103
104         NCR_700_release(host);
105         kfree(hostdata);
106         free_irq(host->irq, host);
107         release_mem_region(A4000T_SCSI_ADDR, 0x1000);
108
109         return 0;
110 }
111
112 static struct device_driver a4000t_scsi_driver = {
113         .name   = "a4000t-scsi",
114         .bus    = &platform_bus_type,
115         .probe  = a4000t_probe,
116         .remove = __devexit_p(a4000t_device_remove),
117 };
118
119 static int __init a4000t_scsi_init(void)
120 {
121         int err;
122
123         err = driver_register(&a4000t_scsi_driver);
124         if (err)
125                 return err;
126
127         a4000t_scsi_device = platform_device_register_simple("a4000t-scsi",
128                         -1, NULL, 0);
129         if (IS_ERR(a4000t_scsi_device)) {
130                 driver_unregister(&a4000t_scsi_driver);
131                 return PTR_ERR(a4000t_scsi_device);
132         }
133
134         return err;
135 }
136
137 static void __exit a4000t_scsi_exit(void)
138 {
139         platform_device_unregister(a4000t_scsi_device);
140         driver_unregister(&a4000t_scsi_driver);
141 }
142
143 module_init(a4000t_scsi_init);
144 module_exit(a4000t_scsi_exit);